Method for producing variable twist yarn



Feb. 6, 1962 R. T. REID 3,019,593

METHOD FOR PRODUCING VARIABLE TWIST YARN Filed Nov. 6, 1959 2Sheets-Sheet 1 /z /fd/ .9. v -l K U- fd/ Feb. 6, 1962 R. T. REID3,019,593

METHOD FOR PRODUCING VARIABLE TWIST YARN Filed Nov. 6, 1959 2Sheets-Sheet 2 5'5 I 50 n 5/ ml 20 I /7 i 52 /5 T I. i

United States Patent Ofifice 3,019,593 Patented Feb. 6, 1962 Filed Nov.6, 1959, Ser. No.-851,356 2 Claims. (Cl. 57-156) This invention relatesto a method of producing a novelty yarn on a twister and moreparticularly to means for imparting a controlled variation in the twistof one of the plies.

In the production of pile fabrics and particularly floor coverings, itis desirable to break up the regularity which sometimes is present inthe surface of such fabrics. Various mean-s for sculpturing or texturingthe pile of carpets are well known. The present invention accomplishes arandom textured effect in the carpet by breaking up the various colorsin a plied yarn in such a way that first one color and then the otherpredominates. In general, such an expedient has been performedpreviously, but it has been impossible to produce a satisfactoryMoresque-type yarn on a conventional twister at less than 11 turns perinch. It is a primary object of the present invention, therefore, toprovide a method of producing a splash-type yarn on a conventionaltwister at a substantially lower twist level than was previouslypossible.

A further object of the invention is to provide on a twister a traverserod and means for oscillating said traverse rod to vary one of severalsingles yarns with respect to other singles yarns in the twisting of amulti- P y v Further objects will be apparent from the specification anddrawings in which:

FIG. 1 is a front view of a conventional twister having the presentinvention installed thereon,

FIG. 2 is an enlarged sectional view as seen at 2-2 of FIG. 1,

FIG. 3 is a top view of a part of the device as seen at 3-3 of FIG. 1,

FIG. 4 is a fragmentary end view as seen at 4- 4 of FIG. 1, and

FIG. 5 is a view of the splash-type Moresque yarn formed in accordancewith the present invention.

The invention comprises essentially the provision of means which in thepreferred embodiment takes the form of a traverse rod to variablycontrol the twisting of one of several singles with respect to thetwisting of the remaining singles which are of a contrasting color.

Referring now to the drawings, a twister of the type adapted to thepresent invention is provided with a framework having at the upper partthereof a series of spindles 11, 11 on which spools or bobbins 12, 12may be mounted. In the present instance there are three spools 12 foreach twisting unit 13 and the yarns from two of these spools are carrieddirectly over rollers 14 and 15 through the yarn guide 16, thence toring and traveler 17 or a flyer, whereupon the two plies 18 and 19, aswell as the third ply 20, are wound on a spool 21. In accordance withconventional practice, the spools 21 are mounted on spindles 23, 23which are journaled in the framework at 24 and driven by means of belts25, 25.

The yarn control means, for example, ring and traveler 17 is mounted ona traverse bar 26 which oscillates ver-.

1 tically on guides 27 in accordance with conventional practice for suchbuilder motions.

--In order to vary the twisting characteristics of yarn end 20 withrespect to yarn'ends 18 and 19, I provide an oscillating traverse rod 30which is journaled or supported-on a series of rollers 31 mounted inbrackets 32 secured to the frame 10 of the twister. The traverse rod 30is provided with a plurality of pigtail guides 33 positioned between theroller 15 and the guides 16 for each spindle 24. Traverse rod 30 isconnected to a crank 34 by means of a pitman 35, a knuckle 36, and anadjusting link 37 so that it oscillates back and forth when shaft 38turns the crank 34. Shaft 38 is journaled in bearing brackets 39 and 40and is provided at the opposite end with a bevel gear 41 driven by ameshing bevel gear 42 on stub shaft 43. Shaft 43 is in turn driven frommain shaft 44 through a spur gear 45, idler gear 46, and pinion 47 keyedto the shaft 44. Adjustment for the relative speeds of shafts 3'8 and 44is achieved by means of substituting different pitch diameter gears inplace of driving gear 47 and adjustment for the stroke of traverse rod30 is made by loosening bolt 48 and swinging link 37' to or away fromthe center of shaft 38 as shown by the arrow in FIG. 3.

As seen more clearly in FIG. 2, yarn ends 18 and 19 are fed through ayarn guide 50 and over the upper roller 14 and around the lower roller15. Rollers 14 and 15 are driven to feed yard by means of a frictionroller 51 which is in turn driven by a shaft 52. Rollers 14 and 15 arereleasably mounted in a bracket 53 secured to the twister frame at 54.Yarns 18 and 19 feed directly to the spool 21 through the pigtail yarnguide 16 which has been lowered from its conventional higher positionshown in broken lines. A third singles yarn 20 drawn from spool 12a iscarried through the pigtail guide 33 on the traverse rod 30. Because ofthe simple harmonic motion imparted to traverse rod 30, the singles yarn20 is wound or twisted with the other singles yarns 18 and 19 at agreater number of turns per inch when the pigtail guide 33 approaches oris at its mid-position. At either end of the travel of the guide 33 yarnthat would otherwise be twisted with singles 18 and 19 is robbed. orconsumed in displacing singles 20 an amount necessary to run through theguide 33 in its limit position. This, in effect, provides a yarn storagewhich builds up when the guide 33 moves in either direction away fromits center position. The stored yarn is then rapidly released as theyarn guide reverses its direction of travel and moves from eitherextreme position towards its mid-position. With proper adjustment andcontrol it is possible to completely mask the other singles in the pliedyarn 55 (FIG. 5). Thus a yarn such as shown in FIG. 5 can be produced.The light colored areas 56, 56 represent the singles yarns 18 and 19whereas the darker areas 57 in FIG. 5 correspond to singles yarn 20 andshow how the white or light areas 56 can be substantially or com pletelycovered up thus entirely changing the appearance of the plied yarn 55.It will be understood that only one unit of a conventional twistingframe has been described in detail but that traverse rod 30 extendsalong one entire side of a twisting frame, three units of which areshown in FIGURE 1.

The device'described herein is relatively simple and produces a novelsplash-type, uniform denier yarn which is not, strictly speaking, a slubyarn since only one of the plies is varied with respect to the otherplies and the same two or more plies are continuous throughout theentire length of the yarn. The variation and Moresque effect is, ofcourse, achieved when the variable twist ply is of a contrasting colorto one or more of the other plies. The invention is particularly suitedto three ply yarn but is equally adapted to the twisting of anymulti-ply yarn.

Having thus described my invention, I claim:

1. The method of twisting a splash-type, uniform denier yarn whichcomprises plying at least one singles yarn under constant and uniformtwist with another singles yarn under conditions of variable twist toprovide a relatively masked area in one length of the uniformdenierplied yarn and an unmasked area in another area of theuniformdenierplied yarn.

2. The method of twisting a non-slub, uniform denier yarn whichcomprises the steps feeding at constant and uniform speed a singles yarnend to a yarn take-up, and variably twisting another singles yarn withsaid first singles yarn to provide a uniform denier plied yarn on saidyarn take-up.

References Cited in the file of this patent UNITED STATES PATENTS

